The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 1 |
| 3 | 54 |
| 4 | 15 |
| 5 | 1 |
| 6 | 629 |
| 7 | 225 |
| 8 | 24 |
| 9 | 1 |
| 10 | 9003 |
| 11 | 3770 |
| 12 | 504 |
| 13 | 33 |
| 14 | 1 |
| 15 | 153276 |
| 16 | 71655 |
| 17 | 10988 |
| 18 | 891 |
| 19 | 42 |
| 20 | 1 |
| 21 | 3031553 |
| 22 | 1539315 |
| 23 | 259236 |
| 24 | 23903 |
| 25 | 1386 |
| 26 | 51 |
| 27 | 1 |
| 28 | 68406990 |
| 29 | 37072448 |
| 30 | 6688092 |
| 31 | 672672 |
| 32 | 44135 |
| 33 | 1989 |
| 34 | 60 |
| 35 | 1 |
| 36 | 1736020806 |
| 37 | 992226060 |
| 38 | 188767184 |
| 39 | 20225436 |
| 40 | 1442049 |
[1,6,1,54,15,1,629,225,24,1,9003,3770,504,33,1, 153276,71655,10988,891,42,1,3031553,1539315, 259236,23903,1386,51,1,68406990,37072448,6688092, 672672,44135,1989,60,1,1736020806,992226060, 188767184,20225436,1442049] |